Abstract:
A strata support system that provides support and balance to a rock mass and reacts to movement of the rock mass. The strata support system includes a borehole that is drilled into a surface of the rock mass. A resin is disposed in the borehole to secure a cable within the borehole. An anchor cable bolt assembly having a plurality of strands that are twisted together to form the cable is inserted into the borehole. At least one of the plurality of strands includes an interrupted outer surface that is defined by a plurality of spaced indentations. The plurality of spaced indentations are formed along the length of the strand and provide for a plurality of surface contours to enhance engagement of the anchor cable bolt with the resin.
Abstract:
Изобретение относится к канатному производству и может быть использовано для армирования монолитных строений и других изделий из бетона. Задача заключается в создании самовыпрямляющегося арматурного элемента. Арматурный канат содержит центральную проволоку и навитые вокруг нее по спирали повивочные проволоки с периодическим профилем. На наружный участок поверхности повивочных проволок нанесен периодический профиль, выполненный в виде наклонных выступов над образующей обжатой поверхности каната. Участки поверхности повивочных проволок, контактирующие с другими проволоками, выполнены в форме спирально расположенных плоских площадок. Канат закрепляют у основания сооружения и в каждом из циклов заливки фиксируют между ранее сформированной частью сооружения и распределительным шаблоном. Канат подают через обводные ролики и направляющую проводку с катушек, расположенных у основания. Перед каждым циклом заливки шаблон отводят на величину формируемого участка. Каждый арматурный элемент является цельным по всей длине сооружения. Соединение перпендикулярных элементов осуществляют втулками или вязальной проволокой.
Abstract:
The present invention is directed to a steel rope safety system (30) comprising at least one steel rope (10, 20) having at least one strand(22), characterized in that said at least one rope (10, 20) or at least one strand is compacted. Further, the present invention is directed to a method for making a steel rope safety system (30) comprising the step of providing at least two wires (24), the step of stranding the wires thereby forming a strand for a rope and the step of compacting the strand. The present invention is also directed to the use of compacted steel ropes as impact reducing material.
Abstract:
La présente invention concerne des câbles hybrides à couches dont certains sont utilisables pour renforcer au moins une nappe sommet de protection de pneumatiques poids-lourd ou génie civil, et d'autres pour renforcer des bourrelets de pneumatique pour véhicules légers à moteur, tels que des motocyclettes. L'invention concerne également un tissu composite utilisable comme nappe de sommet de protection de tels pneumatiques poids-lourd ou génie civil, une tringle destinée à renforcer ces bourrelets de pneumatique et les pneumatiques précités. Un câble hybride à couches (C) selon l'invention comporte une couche interne (C i ) non métallique et une couche externe (C e ) insaturée comportant des torons (T) qui sont chacun au moins en partie métalliques et qui sont enroulés en hélice sur ladite couche interne, et ce câble présente un allongement relatif à la rupture At, mesuré en traction selon la norme ISO 6892 de 1984, qui est supérieur à 7 %. Selon un autre aspect de l'invention, cette couche interne est constituée d'au moins un matériau présentant un allongement relatif à la rupture Ar à 20° C qui est supérieur à 6 %.
Abstract:
A first aspect of the present invention relates to a filament (11; 12), especially for reinforcing rubber articles. Said filament (11; 12) features a contact surface (14) and an outer surface (13). In a second aspect, the invention relates to a steel cord (10) comprising two of said filaments (11, 12), the contact surfaces (14) are arranged adjacent to each other. The outer surfaces (13) are configured arcuate shaped and provide a smooth outer contour (15) of the steel cord (10). Due to said construction the largest dimension (d) of the steel cord (10) and the thickness of a rubber coating (18) may be considerably reduced. Additionally the invention relates to a method of producing a steel cord (10) and to a tyre (20) comprising a carcass ply (22) and/or at least one belt (25; 26) including said steel cords (10).
Abstract:
A high tensile steel strand for civil engineering applications comprises a core wire (11) and a ring of outer wires (12) arranged in a helical pattern around the core wire and in contact with the core wire. The number and the diameter of the outer wires in relation to the core wire are such that there are significant gaps (13) between adjacent outer wires. The strand is used as an anchorage in rock and a bonding agent between the strand and the rock penetrates gaps (13) to provide effective bonding. The strand is sufficiently flexible to be inserted in deep bores in rock even when surrounding space does not permit straight insertion of the strand.
Abstract:
A steel cord (114) for the reinforcement of rubber products comprises strength elements (100, 132) and has length, a longitudinal central axis (112) and a cord pitch. Each of the elements (100) has a projection on a plane YZ perpendicular to the longitudinal central axis (112). At least one of these projections takes the form of a curve with a radius of curvature which alternates between a maximum and minimum. The curve further has a center of curvature. The radius of curvature and the center of curvature lie inside the curve so that a convex curve is obtained. The cord (114) is further characterized by one or both of the following features: (i) the distance between two minimum radii of curvature of said curve measured along the longitudinal central axis (112) is different from half the cord pitch; or (ii) if all of said elements (100) provide a convex curve, at least one of said convex curves substantially differs from another convex curve. The steel cord (114) allows full rubber penetration despite low values of cord diameter and part load elongation (PLE).
Abstract:
Parts (6) of the exposed surfaces of a plurality of the helically extending outer wires (4) of a strand (1), e.g. for use as a roof bolt, are upset in a substantially non-axial direction. The upset parts or indentations (6) enhance keying to the anchoring medium and resist the tendency of the strand (1) to screw out of the anchoring medium, in use.
Abstract:
A hybrid rope constructed of a plurality of strands, wherein each strand is constructed of a fiber center, a jacket surrounding the fiber center, and a plurality of wires surrounding the jacket. The fiber center can be constructed of one or more high-strength synthetic fibers or yarns. The jacket can be constructed of polypropylene, thermoplastic polyurethane, high-density polyethylene, linear low-density polyethylene, nylon or other similar materials. The jacket can have a braided or woven design and adds a protective layer between the fiber center and the wires. The wires can be constructed of high-strength steel wires, galvanized steel or stainless steel. The fibers or yarns that make of the fiber center are twisted to lay right and then covered with the jacket. The wires then surround the jacket and are twisted to lay to the left. This creates a torque-balanced condition of the hybrid rope.
Abstract:
The invention relates to a method for producing an assembly (A) of filiform elements (14) wound together in a spiral, comprising: a step of twisting at least first and second filiform elements (14), the first and second filiform elements (14) being twisted separately from one another; a step of preforming at least the first and second twisted filiform elements (14) in a spiral, the first and second twisted filiform elements (14) being preformed separately from one another; and a step of assembling at least the first and second twisted and preformed filiform elements (14) in order to form the assembly (A) of filiform elements (14).